Troubleshooting OC Error Code on Hayes Engage Trailer Brake Controller HA81760
Question:
My tundra back taillight stay on and or shut off and turn back on... my engage system blinks oc pled help
asked by: Mark D
Expert Reply:
With the Hayes Engage Trailer Brake Controller # HA81760 the code OC indicates that the controller does not sense an electrical connection to the trailer brakes, or that the trailer has electric-over-hydraulic brakes which do not work with this unit.
Since you also have an issue with your tail lights staying on the problem is almost surely corrosion inside the trailer connectors.
Corrosion can build up inside a vehicle's socket and inside a trailer's plug and sometimes it is hard to see it. Check both the vehicle socket for signs or corrosion, trapped dirt or water. These issues can cause two different circuits to become bridged together and can also cause connection problems in the brakes circuit.
Clean all contacts on the vehicle socket and on the trailer plug and apply dielectric grease # 11755 once everything works again. The grease will protect the contacts from further corrosion.
Products Referenced in This Question
Dielectric Grease for Electrical Connectors, 2 oz.
- Accessories and Parts
- Trailer Wiring
- Wiring
- Dielectric Grease
- LubriMatic
more information >
Product Page this Question was Asked From
Hayes Engage Trailer Brake Controller - 1 to 3 Axles - Time Delayed
- Trailer Brake Controller
- Time Delayed Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 3 Axles
- Indicator Lights
- Up to 360 Degrees
- Hayes
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Shop: Hayes Engage Trailer Brake Controller - 1 to 3 Axles - Time Delayed
- Shop: Trailer Wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Redarc Tow-Pro Elite Brake Controller - Dash Knob - 2 Braking Modes - 1 to 3 Axles - Proportional
- Q&A: Troubleshooting Brake Controller With OC Code Flashing
- Q&A: Troubleshooting Hayes Engage Brake Controller Showing BF Error Code
- Shop: 6-Leaf Double-Eye Spring for 7,000-lb Trailer Axles - 24-7/8" Long
- Shop: 6-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 26" Long
- Search Results: c51362
- Article: How to Accurately Measure Trailer Leaf Springs
- Video: Review of etrailer 6 Leaf Double Eye Spring - e94SR
- Q&A: How To Determine the Weight Capacity For a Trailer Axle
- Shop: Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional
- Q&A: Hanger Spacing Recommendations for a Triple Axle Trailer with 25-1/4 inch Springs
- Shop: Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug
- Q&A: Should the Hayes Engage Trailer Brake Controller Flash OC Without a Trailer Connected
- Shop: Universal Wiring Adapter for Hayes Trailer Brake Controllers
- Video: Hayes Engage Trailer Brake Controller Installation - 2022 Ram 1500
- Video: Hopkins Trailer Wiring Harness Installation - 2015 Ford F-53
- Video: Hayes Engage Trailer Brake Controller Review
- Q&A: How do I Tell if the Brake Controller is Bad
- Q&A: Troubleshooting a Hayes Energizer Brake Controller with Trailer Brakes Not Working
- Article: Trailer Wiring Diagrams
- Article: Troubleshooting Brake Controller Installations
- Article: Towing a Trailer? Let's Talk About Brake Controllers
- Video: Review of Hopkins Wiring - 7-Way Blade to 7-Pole Round Wiring Adapters - 47595
- Search Results: brake controller
- Shop: Trailer Hitch
- Video: Choosing the Right Trailer Wiring
on Trailer Brake Controller
